4 ms·

Being submerged in water will substantially help thermals.

by 9991 3y ago

alchemist1e9 3y ago
Is it possible one could coat electronics like this, then submerge them in (distilled maybe) water within an ice pack, freeze them, then use them and the heat melts the ice?
- kadoban 3y ago
  Yes. Freeze/thaw cycles are _remarkably_ destructive though. Water expands with insane pressure if it gets caught in any little cavities or grooves. You're very likely to destroy it over time, if not immediately.
  - alchemist1e9 3y ago
    Maybe it could instead be within some type of very thin pouch/layer of dielectric liquid, like in immersion cooling, and then water/ice outside of that so the force of expansion from freezing could be distributed?
    - tonyarkles 3y ago
      I’m not sure I’m following the end game here with freezing it. From what I recall ice is actually a pretty decent thermal insulator and since a given mass of ice is larger in volume than the same mass of water, you’d end up with a hole melting inside with… weird things happening as far as pressures go. If the goal is to keep the processor nicely chilled, you’d probably be better off running liquid water over/through the block of ice and then keeping the coated board chilled in the ice water bath. If you’re trying to get below 0C, you should probably keep using a liquid with a lower freezing point instead of having the board frozen in a block.
      - alchemist1e9 3y ago
        > I’m not sure I’m following the end game here with freezing it. My kids playing on the Mega VR headset and complaining about it getting hot is one example of my line of thought. Let’s say you have to absorb the heat generated by a given amount of electricity but want to do it in the most weight efficient way possible. It turns out that regular old water has basically the highest latent heat of fusion at room temperature and pressure, which means a block of ice can absorb more heat by melting than pretty much anything else gram for gram. What if the VR headset could just freeze itself overnight and then no fans or reliance on dissipating heat into the external environment but instead into the ice. It’s probably stupid but I do know water is the best know molecule in terms of latent heat of fusion per gram at room temperature and pressure.

Being submerged in water will substantially help thermals.

by 9991 3y ago

Being submerged in water will substantially help thermals.

Is it possible one could coat electronics like this, then submerge them in (distilled maybe) water within an ice pack, freeze them, then use them and the heat melts the ice?

kadoban 3y ago
Yes. Freeze/thaw cycles are _remarkably_ destructive though. Water expands with insane pressure if it gets caught in any little cavities or grooves. You're very likely to destroy it over time, if not immediately.
- alchemist1e9 3y ago
  Maybe it could instead be within some type of very thin pouch/layer of dielectric liquid, like in immersion cooling, and then water/ice outside of that so the force of expansion from freezing could be distributed?
  - tonyarkles 3y ago
    I’m not sure I’m following the end game here with freezing it. From what I recall ice is actually a pretty decent thermal insulator and since a given mass of ice is larger in volume than the same mass of water, you’d end up with a hole melting inside with… weird things happening as far as pressures go. If the goal is to keep the processor nicely chilled, you’d probably be better off running liquid water over/through the block of ice and then keeping the coated board chilled in the ice water bath. If you’re trying to get below 0C, you should probably keep using a liquid with a lower freezing point instead of having the board frozen in a block.
    - alchemist1e9 3y ago
      > I’m not sure I’m following the end game here with freezing it. My kids playing on the Mega VR headset and complaining about it getting hot is one example of my line of thought. Let’s say you have to absorb the heat generated by a given amount of electricity but want to do it in the most weight efficient way possible. It turns out that regular old water has basically the highest latent heat of fusion at room temperature and pressure, which means a block of ice can absorb more heat by melting than pretty much anything else gram for gram. What if the VR headset could just freeze itself overnight and then no fans or reliance on dissipating heat into the external environment but instead into the ice. It’s probably stupid but I do know water is the best know molecule in terms of latent heat of fusion per gram at room temperature and pressure.